SUBSIM Radio Room Forums - View Single Post - Looking for player opinions/strategies....

radcapricorn · 07-11-11, 05:42 PM

I assume that 0 degrees is the bearing you've calculated AOB for, right? So when you fire at this bearing, torpedoes will impact several degrees off (how much depends on AOB, range and torpedo speed). This is exactly how it works for method (1):

Let's assume target moves from your starboard to your port (right to left).
You position yourself 90 degrees to target's course. It means that at bearing 0 target's AOB will be 90 degrees to port. Also, it means that at bearing 5 AOB will be 90-5=85 degrees; at bearing 10: 90-10=80 degrees and so on. At bearing 355 it will be 90+5=95, etc. The math is simple in this case, so you can quickly reset AOB for new target by looking at target and taking bearing from the scope.

Now directly to your question. For method (2) you'll want all torpedoes to hit at the same bearing. For simplicity, assume you're still at 90 degrees and want to hit at bearing 0. So, at bearing 0 you know that target's AOB will be 90 degrees (this will be true for all targets). So you point your scope at bearing 0 (easy to do with "view to heading" command), switch TDC to manual input, enter 90 degrees AOB and target's speed (don't forget to press red "send data" button for each parameter). The range to target is not really important in this case due to triangle similarity. I.e. you can enter the range to closest target. Then, you switch TDC back to automatic, and turn your scope towards the target, at the same time monitoring gyro angle dials of the TDC. You need to stop your scope at the bearing where both gyro angle dials will show 0. This will be your shooting bearing. Naturally, due to such positioning, the first ship to cross your scope will be the farthest one (exactly the one you want to shoot first). So you just wait for it to cross the scope and fire. Then you wait for the second one to cross scope (some seconds at most) and fire again. Same with the third one. You can even set each torpedo depth beforehand if you have the opportunity to identify each target's draft, so you won't have to do this in between shots.

To simplify: if you can hit targets at the same bearing, you need to pre-calculate AOB once and then fire when TDC shows gyro angle 0. If you can't, you need a fast and easy way to recalculate AOB for each shooting bearing.

Take a look at these great videos. Stoianm demonstrates all the mechanics there. Keep in mind that he uses different terminology (he calls "rows" what I call "columns" and vice versa).

07-11-11, 05:42 PM	#4
radcapricorn Helmsman Join Date: Jun 2011 Posts: 105 Downloads: 181 Uploads: 0	I assume that 0 degrees is the bearing you've calculated AOB for, right? So when you fire at this bearing, torpedoes will impact several degrees off (how much depends on AOB, range and torpedo speed). This is exactly how it works for method (1): Let's assume target moves from your starboard to your port (right to left). You position yourself 90 degrees to target's course. It means that at bearing 0 target's AOB will be 90 degrees to port. Also, it means that at bearing 5 AOB will be 90-5=85 degrees; at bearing 10: 90-10=80 degrees and so on. At bearing 355 it will be 90+5=95, etc. The math is simple in this case, so you can quickly reset AOB for new target by looking at target and taking bearing from the scope. Now directly to your question. For method (2) you'll want all torpedoes to hit at the same bearing. For simplicity, assume you're still at 90 degrees and want to hit at bearing 0. So, at bearing 0 you know that target's AOB will be 90 degrees (this will be true for all targets). So you point your scope at bearing 0 (easy to do with "view to heading" command), switch TDC to manual input, enter 90 degrees AOB and target's speed (don't forget to press red "send data" button for each parameter). The range to target is not really important in this case due to triangle similarity. I.e. you can enter the range to closest target. Then, you switch TDC back to automatic, and turn your scope towards the target, at the same time monitoring gyro angle dials of the TDC. You need to stop your scope at the bearing where both gyro angle dials will show 0. This will be your shooting bearing. Naturally, due to such positioning, the first ship to cross your scope will be the farthest one (exactly the one you want to shoot first). So you just wait for it to cross the scope and fire. Then you wait for the second one to cross scope (some seconds at most) and fire again. Same with the third one. You can even set each torpedo depth beforehand if you have the opportunity to identify each target's draft, so you won't have to do this in between shots. To simplify: if you can hit targets at the same bearing, you need to pre-calculate AOB once and then fire when TDC shows gyro angle 0. If you can't, you need a fast and easy way to recalculate AOB for each shooting bearing. Take a look at these great videos. Stoianm demonstrates all the mechanics there. Keep in mind that he uses different terminology (he calls "rows" what I call "columns" and vice versa). Last edited by radcapricorn; 07-11-11 at 05:52 PM.